Hi all, i was wondering who runs there Z on electric fans for cooling. If so are there any advantages/pitfalls against normal OEM set up. Just thinking out loud about it.Cheers

The great electric fan debate !!! not a good idea.

 

 

Jeff

The great electric fan debate !!! not a good idea.

 

 

Jeff

 

This!!

are there any advantages/pitfalls against normal OEM set up

 

Advantages - few, pitfalls - many.

 

Take a look on TT.net for further reading.

Stick with the stock, shrouded viscous fan. A properly working viscous can shift upwards of 6000CFM on max chat. Sure it will zap a bit of power at that speed but it'll keep your engine comfortable. If you have viscous issues, a brand new replacement item is a worthwhile investment.

Hi Joely, not got any problems but was just having a read about things an i just thought out loud lol

 

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The great electric fan debate !!! not a good idea.

 

 

Jeff

 

I Gather this was a hot topic at one point Jeff lol

I'm currently in the process of doing this;

 

 

Where there are two separate temp switches, I will be using one switch with two temp settings so low speed triggered at lower temp etc. I have just bought a Jaguar V6 twin fan and having to mod the mounts and shroud.. :ph34r:

I have just bought a Jaguar V6 twin fan

 

What's the CFM rating for those fans? How do you know they will provide adequate cooling?

Edited May 19, 20169 yr by AndrewG

What's the CFM rating for those fans? How do you know they will provide adequate cooling?

 

Yawn, CFM... I don't really want to get into the CFM pedantic. It's big, and it feels powerful. I have read countless threads on forums about CFM this and that..it's boring.

 

It's an experiment if you will, I am going to install it and watch temps. It will be a damn sight better than what was on there I know that. I' not saying it is adequate but I can always upgrade if its shabby ;)

Yawn, CFM... I don't really want to get into the CFM pedantic. It's big, and it feels powerful. I have read countless threads on forums about CFM this and that..it's boring.

 

It's an experiment if you will, I am going to install it and watch temps. It will be a damn sight better than what was on there I know that. I' not saying it is adequate but I can always upgrade if its shabby ;)

 

Yeah, cos CFM isn't important in a cooling context or anything...

Yawn, CFM... I don't really want to get into the CFM pedantic. It's big, and it feels powerful. I have read countless threads on forums about CFM this and that..it's boring.

 

 

Jesus wept!

I' not saying it is adequate but I can always upgrade if its shabby ;)

 

Assuming of course you catch it in time.

If it aint broke leave it alone and if its the fan then replace it with oem parts. Unless you are building an out and out racer like Bobgenie fitting an electric fan is a mistake imo.

i have an E-fan due to not being able to fit a viscous. its much less cfm than the viscous which i took a risk. it also cools a larger engine with less space and it works.

 

debates are debates. the info is there, the risk is yours, do what you please..

 

just to put it out there...if i didnt have to, i wouldnt have.

Edited May 19, 20169 yr by Hollings

The coolant temp will likely not change at all in normal conditions and everything will be fine and dandy but the position of the thermostat for the same conditions will probably be different. This will change the cooling potential of the system to continue working efficiently in extreme conditions such as track use or heavy traffic on a hot summers day. I like to call it a buffer zone and as Andrew suggests, it may be too late by the time you realise you have exceeded that buffer!

 

If you find the CFM and science of the cooling system boring, what reason do you have to fit an electric fan, what's your motive to experiment?

If your not prepared to sit there and do the math I think your likely to fail. Is it do able? Totally, what at these days has a viscous. It does however take some planning, forethought and tweeking. Alternatively copy someone else's work buy using a ford tanus or Volvo fan. Two dinky 10-12" eBay fans, not saying that's your plan. You need something that can PULL.

ford tanus or Volvo fan.

 

Taurus!!

 

The Taunus was a rebadged MK4 Cortina! :rofl:

Taurus!!

 

The Taunus was a rebadged MK4 Cortina! :rofl:

 

What ever! :lol: some ****y yanky thang. Everyone's cottoned onto them now anyway, robbing the fan out of grandads Volvo is far more practical here in the state of England in the EU.

Big supporter of the OEM fan unit myself, so long as they are working correctly.

It took me a while to realise that my original one was in fact in permanent free wheel and only revolving on drag.

Once I understood what was supposed to be happening with the thing, I changed it a couple of times until I found one that behaved correctly.

 

Now, even in the warmest of weather, it only kicks in when being stationary or moving in slow traffic after about 30 seconds.

The roar is very noticeable, and my RPM only drops by 50/75 RPM.

 

Once I am up to 30 MPH and higher, the fan drops off into free wheel again as the incoming air speed is sufficient to keep things cool, and gives back a little horse power.

No matter what the weather, my temperature gauge always sits a little under halfway.

Big supporter of the OEM fan unit myself, so long as they are working correctly.

It took me a while to realise that my original one was in fact in permanent free wheel and only revolving on drag.

Once I understood what was supposed to be happening with the thing, I changed it a couple of times until I found one that behaved correctly.

 

Now, even in the warmest of weather, it only kicks in when being stationary or moving in slow traffic after about 30 seconds.

The roar is very noticeable, and my RPM only drops by 50/75 RPM.

 

Once I am up to 30 MPH and higher, the fan drops off into free wheel again as the incoming air speed is sufficient to keep things cool, and gives back a little horse power.

No matter what the weather, my temperature gauge always sits a little under halfway.

 

 

This!

 

JoelyP, AndrewG and myself gave our cars quite a roasting going through the Gorge de L'ardeche in southern France last summer in pretty hot conditions and they never once struggled. The stock cooling system is actually pretty good. The only benefit that it can do with is a slightly larger radiator. I still run a stock radiator and I've never ever had issues with it.

This!

 

JoelyP, AndrewG and myself gave our cars quite a roasting going through the Gorge de L'ardeche in southern France last summer in pretty hot conditions and they never once struggled. The stock cooling system is actually pretty good. The only benefit that it can do with is a slightly larger radiator. I still run a stock radiator and I've never ever had issues with it.

 

You should probably remove me from that equation as I was limping through the Gorge with a butchered coolant hose, on my last credit, driving like everything was 100%! Since that trip though, I replaced the hoses, flushed the system and purchased a new OEM clutch, fan and rad cap (which i suspect was the cause of my issue, holding too much pressure, along with a 23 year old rubber pipe!).

JoelyP, AndrewG and myself gave our cars quite a roasting going through the Gorge de L'ardeche in southern France last summer in pretty hot conditions.

 

You should probably remove me from that equation as I was limping through the Gorge with a butchered coolant hose, on my last credit, driving like everything was 100%!

 

Personally I think a larger thicker radiator is of more benefit than changing to electric fans etc, I think there are too many variables to consider to actually reliably measure any improvement in cooling efficiency. I think there becomes a point at which it wouldn't matter how good the fan was at pulling air through the rad, a rad of any given size only has so much surface area exposed to the cooling airflow going through it, increase surface area and you will increase it's ability to cool. Its the reason intercooler upgrades work and they don't use fans at all they just increase the surface area.

 

A fully working stock setup is adequate for everyday use I would say.